User`s guide

E-Prime User’s Guide
Appendix C: Sample Experiments
Page A-38
The TrialList defines the variables to be used within the experiment as attributes, the levels for
the attributes, and the number of repetitions for each of the levels (i.e., set in the Weight
attribute). The properties for the TrialList are set to randomly select a value for Stimulus out of
the available exemplars, and to reset after all of the exemplars have been chosen.
Figure 1. TrialList defines the Stimulus and CorrectAnswer attributes.
The trial Procedure (TrialProc) consists of a TextDisplay object (i.e., Fixation) used to present a
fixation prior to the stimulus display, a TextDisplay object (i.e., Stimulus) used to present an “X” or
a “Y”, and a FeedbackDisplay object (i.e., Feedback) to present the appropriate feedback (i.e.,
correct, incorrect, etc.).
At run-time, the Stimulus object refers to the TrialList in order to resolve the value for the Stimulus
attribute and the CorrectAnswer attribute.
Figure 2. The bracket notation used to refer to the
Stimulus attribute in the TrialList object.